We've all seen "Cornell's Box," the radiosity thing with the green 
white, and red walls etc... I decided to expand on that and give him a 
drop-in ceiling, a bed, chest of drawers and a table.

There's only one problem though- I've been tinkering with the settings 
and the radiosity isn't very well done. I mean, the red and green don't 
reflect enough of the light. Could someone suggest better settings? At 
the time they are:

pretrace_start 0.1             pretrace_end   0.05
count 250                      error_bound 1.8
nearest_count 15               minimum_reuse .05
low_error_factor .05           recursion_limit 2
gray_threshold 0.0             brightness 1.5

Thanks in advance.

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Attachments:
Download 'cornell-room.png' (407 KB)

Preview of image 'cornell-room.png'

Scottish the pig <sco### [at] yahoocom> wrote in 
news:3E1### [at] yahoocom


> error_bound 1.8

1.0 and 0.4 for final trace

> recursion_limit 2

3, and 4 or 5 for final trace

> brightness 1.5

i always use 1.0

and most important - modify textures in scenes 
a) set higher diffuse i.e. 0.9
b) set ambient to 0.0 
  default { finish { ambient 0 diffuse .9 } } 

and set assumed_gamma to 1.9 or even 1.5


-- 
#macro g(U,V)(.4*abs(sin(9*sqrt(pow(x-U,2)+pow(y-V,2))))*pow(1-min(1,(sqrt(
pow(x-U,2)+pow(y-V,2))*.3)),2)+.9)#end#macro p(c)#if(c>1)#local l=mod(c,100
);g(2*div(l,10)-8,2*mod(l,10)-8)*p(div(c,100))#else 1#end#end light_source{
y 2}sphere{z*20 9pigment{function{p(26252423)*p(36455644)*p(66656463)}}}//M

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Scottish the pig wrote:
> We've all seen "Cornell's Box," the radiosity thing with the green 
> white, and red walls etc... I decided to expand on that and give him a 
> drop-in ceiling, a bed, chest of drawers and a table.
> 
> There's only one problem though- I've been tinkering with the settings 
> and the radiosity isn't very well done. I mean, the red and green don't 
> reflect enough of the light. Could someone suggest better settings? At 
> the time they are:
> 
> pretrace_start 0.1             pretrace_end   0.05
> count 250                      error_bound 1.8
> nearest_count 15               minimum_reuse .05
> low_error_factor .05           recursion_limit 2
> gray_threshold 0.0             brightness 1.5
> 
> Thanks in advance.
> 
> ------------------------------------------------------------------------
> 

Still need some help- the ceiling looks a lot better now, but there are 
plenty of oddities as well- like the artifacts on the walls.

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Attachments:
Download 'cornell-room.png' (483 KB)

Preview of image 'cornell-room.png'

"Scottish the pig" <sco### [at] yahoocom> wrote in message
news:3E1### [at] yahoocom...

Please don't post such large files. Some of us are stuck at work with ISDN
connections.

 -Shay

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> Please don't post such large files. Some of us are stuck at work with ISDN
> connections.

*Some* of us are stuck with 56k modems at home...

Jamie.

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On Mon, 6 Jan 2003 21:53:51 -0000, Jamie Davison
<jam### [at] ntlworldcom> wrote:

>*Some* of us are stuck with 56k modems at home...

And some still use 33.6 modems which connect at 26.4... and yet have
the whole news.povray.org archive :)


Peter Popov ICQ : 15002700
Personal e-mail : pet### [at] vipbg
TAG      e-mail : pet### [at] tagpovrayorg

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> >*Some* of us are stuck with 56k modems at home...
> 
> And some still use 33.6 modems which connect at 26.4... and yet have
> the whole news.povray.org archive :)

Well, I *say* a 56k modem, but it only connects at 38.6k :)

Jamie.

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Rafal 'Raf256' Maj wrote:
> and set assumed_gamma to 1.9 or even 1.5

Shouldn't you always use 1.0, if you want realistic results?

Anders

--
#macro E(D)(#if(D<2)D#else#declare I=I+1;mod(pow(.5mod(I 6))*asc(substr(
"X0(1X([\\&Q@TV'YDGU`3F(-V[6Y4aL4XFUTD#N#F8\\A+F1BFO4`#bJN61EM8PFSbFA?C"
I/6 1))2)<1#end)#end#macro R(D,I,T,X,Y)#if(E(D))R(D-1I,T,Y/2X)R(D-1I,T+Y
/2Y/2X)#else box{T T+X+Y pigment{rgb E(2)*9}}#end#end R(10,5z*3-1v*2u*2)

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Scottish the pig <sco### [at] yahoocom> wrote in 
news:3E1### [at] yahoocom

> error_bound 1.8

as I said before, error bound is WAY to big, it should be 0.5 or smaller, 
did You read my post ?

-- 
#macro g(U,V)(.4*abs(sin(9*sqrt(pow(x-U,2)+pow(y-V,2))))*pow(1-min(1,(sqrt(
pow(x-U,2)+pow(y-V,2))*.3)),2)+.9)#end#macro p(c)#if(c>1)#local l=mod(c,100
);g(2*div(l,10)-8,2*mod(l,10)-8)*p(div(c,100))#else 1#end#end light_source{
y 2}sphere{z*20 9pigment{function{p(26252423)*p(36455644)*p(66656463)}}}//M

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In article <m9bl1v8b8geuq1mml7l958oer5ffs2i0gl@4ax.com>,
 Peter Popov <pet### [at] vipbg> wrote:

> >*Some* of us are stuck with 56k modems at home...
> And some still use 33.6 modems which connect at 26.4... and yet have
> the whole news.povray.org archive :)

In a way, you are better off than me...56k at 26.4. And no archive.

-- 
Christopher James Huff <cja### [at] earthlinknet>
http://home.earthlink.net/~cjameshuff/
POV-Ray TAG: chr### [at] tagpovrayorg
http://tag.povray.org/

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